Device for automatically recording the amount of carbonic acid in products of combustion.



PATENTED MAY 12, 1903.

P. SCHULTZB. DEVICE FOR AUTOMATICALLY RECORDING THE AMOUNT OF CARBONIG ACID IN PRODUCTS 0P COMBUSTION.

APPLICATION FILED SEPT. 24, 1901.

N0 MODEL.

W/T/VESSES.

ATTORNEYS.

No. was.

Patented May 12, 1903.

Fji l tlE.

a a. lafreir PAUL SCllULl'ZE, ()FBERLIN, GERMANY.

DEVlCE FOR Allil' lilA'iICALLY RECORDING THE AMOUNT OF CARBONIC AClD lN PRODUCTS 0F COMBUSTIOlh SPEGXLFIGATION formingpart of Letters Patent No. 728,022, dated May 12, 1903. Application filed September 24, 1901. Serial No. 76,338. (No model.)

T0 at whom, it may concern:

Be it known that 1, PAUL SCHULTZE, a citizen of the Empire of Germany,residing in Berlin, Germany, have invented certain new and usefullmprovements in Devices forAutomatically PtecordingthellmountofCarbonic Acid in Products of Combustion, of which the following is a specification.

This invention relates to an improved device for recording the amount of carbonic acid in smoke; and its object is to provide a reliable means for periodically recording the proportion of carbonic acid with the other gases of smoke, so as to facilitate the regulation of draft or stoking appliances or to ascertain the reliability of the fireman.

In order to accomplish this result, the invention consists ofa device for recording the amount of carbonic acid in combustion products comprising,in combination with a smokegas analyzer, a registering-camera adapted to have a continuously-moving periodically-exposed sensitized recordsheet and means for directing rays of light through the measuring-tube of the analyzer to affect the exposed portion of the record-sheet, as will be more fully described hereinafter, and finally pointed out in the claims.

In the accompanying drawings, Figurel is a perspective view of a gas-analyzer with parts of the recording device attached. Fig. 2 is a perspective view of the recording-camera detached from the analyzer. Fig. 3 is also a perspective View of a slotted cylinder adapted to be rotatably supported in the camera, but shown detached therefrom. Fig; 4 is a side view of the camera, showing the rotatable drum on which the slotted cylinder is placed to be rotated therewith.

Referring to the drawings, a gas-analyzer is shown, the construction of which forms no partof my invention; but the same consists of an inverted-U-shaped tube 1, having its branches (1 b of uniform cross-section and provided at their ends with the drain-cocks c 10, respectively. Adjacent the lower end of the branch a is connected a tube (Z of proportionately-reduced diameter and provided with a cock f, said pipe d serving for the purpose of supplying filtered and cooled products of combustion to the branch (L. Atmospheric is supplied to the other branch 1) through a small tube 2, controlled by a stopcock c. The bend of the U-shaped pipe -1 is connected bya pipe h with a suitable vacuum or suctionproducing device at the boiler (not shown) for the purpose of inducing a suction of some of the products of combustion from the furnace into the branch a and of airinto branch I; when the cocksfc, respectively, are open. A mixture of air and combustiongases takes place at the bend of the tube 1, which mixture will pass through the pipe 7b, to which is applied a manometerj and a regulating-valve g. At the lower ends of the branches 0. and b are provided three-way cocks in and Z, respectively, Whichare connected by a link device Z for opening or closing the cooks simultaneously. These cocks are connected with a micrornanometer y, the cock Z being connected to the vesseltthrough the pipe n, while the cock 7.; is connected with the measuring-tube 13 of the micromanometer through the pipe m. When the cooks 7c and l are turned in one positiou,the pipesm and n of the micromanomcter are connected with the atmosphere. Then the micromanometer will read zero. When, however, both cocks are turned in opposite direction,the pipe at will connect the branch I) with the measuring-tube 13 of the micromanometer and the pipe or will connect the branch (L with the vessel t. Then the micromanometer will indicate the pressure difference existing between the cocks in and Z. The microinanometer consists of a plate A, supported by posts 9 9 on an adjustable plate at, and to which is suitably fastened the vessel 2', which contains a suitable mobile medium, and the measuringtube 13, which is in communication therewith and slightly inclined to the horizontal and having one end hermetically sealed in the vessels and at its opposite end supported in a post 31. The adjustment to the correct inclination of the micromanometer is accomplished by set-screws 6 and 7 between the base-plate 3 and the adjustable plate 4, arid the accuracy of the adjustment is facilitated by the levels 8' and 8 Upon the plate 4 and at the rear of the measuring-tube 13 is arranged a standard 10, to which is attached a lamp 11. Vertically below the lamp 11 is arranged a reflecting-mirror 12, set at an angle of forty-five degrees,so as to reflect light through the measuring-tube 13. A recording-camera 15 is adapted to be placed in front of the measuring-tube upon the front portion of the plate 4 and is secured by means of its perforated base-plate 16 engaging pins 17 of the plate 4, said plate 4 being provided with a recess 18 for receiving the base-plate 16. The camera is arranged with its lens-tube 14 approximalely at a level with the measuring-tube, so as to receive the rays of light reflected from the mirror 12. The front portion of the camera is cylindrical in shape and is provided with a circular lid 20, secured to the frame of the camera by a hinge 19 and locked in closed position by the clasp 21. The cylindrical end of the camera contains a suitable molor device, such as a clockwork W, for operating a drum D placed on the shaft M. This drum is adapted to carry on its exterior surface a sensitized record-sheet, and concentrically around the drum and to rotate therewith is a cylinder 23, which is provided with horizontal slots in its circumference. One end of the cylinder is provided with an annular dial portion 27,.providedwith twelve divisions corresponding to the number of hours in which a full revolution of the cylinder is made and also smaller divisions representing quarter hours. The transverse slits of the cylinder are about two hundred and fifty in number, so that during the revolution the light is admitted into the camera and passes through the slits at small intervals of time, so as to photograph'the position of the fluid in the measuring-tube. Adjacent the graduated dial 27 is arranged circumferentially openings 25, corresponding to the stoking shifts, and diametrically of the cylinder is arranged a chain 26 for facilitating the removal of the cylinder, so as to remove and replace the sensitized record-sheet on the drum. The lid of the camera is suitably lined, so that when the same is closed light is completely excluded from the interior. On one side of the camera, at the edge of the lid, is hinged a hand or index 28, by means of which the rotating drum may be set to correspond to a certain time of beginning, said hand being turned in toward the dial oi the cylinder after the lid has been turned down and then thrown back whep it is desired to close the camera to the position as shown in Fig. 2. The camera is also provided with a handle 22. v

For recording the various pressures of the carbonic acid in the products of combustion,

and thereby the proportion of the same, the rays of light from the lamp that strike the mirror are reflected through the measuring-tube of the micremanometer and are photographed upon the sensitized sheet. The

measuring-tube receives an opaque fluid from the vessel t, which prevents the rays of light from passing through the portion of the tube that contains this opaque mobile fluid. According to the variations in pressure of the gases the opaque fluid is acted upon, varying correspondingly in the extent to which it passes into the tube, and thereby the rays of light that pass through the measuring-tube are either diminished or increased and pass through a corresponding portion of the slit of the cylinder that is opposite the lens to efiect the sensitized record-sheet. In this way by the constant revolution of the cylinder and drum theperiodical readings of the state of pressure of the carbonic acid are photographed on the record-sheet, which when developed will constitutea record from which theamount of carbonic acid in the products of combustion can be ascertained.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. A device for automatically recording the amount of carbonic acid in products of combustion, comprising a smoke-analyzer, a micromanometer adapted to receive the carbonic acid of said analyzed smoke and provided with a measuring-tube, a lamp, a mirror, a camera suitably arranged to receive the reflected light from the lamp, a rotating cylinderin said camera having transverse slits in its cylindrical surface, and a drum rotating with said cylinder and provided with a sensitive recordingsheet to be acted upon by the light reflected through the measuring-tube of said micrornanometer and slits of the rotating cylinder, substantially as set forth.

2. in a device for automatically recording the amount of carbonic acid in smoke, the combination, with a micromanometer pro-' vided with a measuring-tube of a lamp, a mirror adjacent said tube for reflecting light through the same, a recording-camera suitably arranged to receive the reflected light, a rotating cylinder in said camera having transverse slits in its cylindrical surface and time divisions on one of its bases, and a drum rotating with said cylinder and being provided with a sensitive recording-sheet to be acted upon by the light reflected through the measuring-tube of. the micromanometer and slits of the rotating cylinder, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

PAUL SOHULTZE.

Witnesses:

WOLDEMAR IIAUP'r, HENRY llAsPER. 

